Oil well pump



Dec. 31, 1935. D. s. GALL OIL WELL PUMP Filed Dec. 19, 1955 2Sheets-Sheet l awe/who'll U A. W Q 2* 1 u G I p 4 J 5 2 5 X Z w 2 z z ZL x w W W W \n\ W M\ W 7 E /is MM 9 Z Z Z W M W L QM M l m D. G. GALLOIL WELL PUMP Filed Dec. 19, 1933 2 Sheets-Sheet 2 Patented Dec. 31,1935 UNITED STATES PA l E'NT oF-FI- Application December 19,1933, SerialNo. 703,118

2 Claims.

This invention relates to well apparatus and pertains particularly to animproved form of pump.

The primary object of the present invention is to provide an improvedpump structure which is designed primarily for use in oil wells, whichis so designed that the entrance of sand or other granular matterbetween the relatively moving parts thereof is positively prevented,thereby insuring longer working life for the parts than is had in pumpsof the type at present in use.

Another object of the invention is to provide a pump in which the fluidpressure is applied to the bottom of a traveling barrel so that thefluid en- 5 ters the barrel when the latter is lowered and is trappedand lifted thereby when it is raised.

Still another object of the invention is to provide an improved wellpump wherein there is employed a stationary plunger and a moving plungerwhich encircles and works on the stationary plunger and which receivesfluid from the well in its lower end, whereby the introduction of sandor other gritty matter in between the working parts is avoided.

- 5 A still further object of the invention is to provide a well pumpwherein novel means employed in association with the pumping, unitproper whereby the bottom or stand valve of the well may be engaged andremoved with the pumping ap- 30 paratus.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawings forming part of this specification with the understanding,however, that the invention is not confined to any strict conformitywith the showing of the drawings but may be changed or modified so longas such changes or modifications mark no material departure from thesalient fea- 40 tures of the invention, as expressed in the appendedclaims.

In the drawings, the pump and well casing in which it is shown isillustrated in longitudinal section and has been divided transverselyinto 45 four sections for convenience in making clear the relation ofthe several parts and;

Figure 1 represents the longitudinal section of the upper portion of thestructure showing its conection with the well liner.

50 Figure 1 is a longitudinal section through the portion immediatelyadjoining the part I.

Figure 1 is the longitudinal section through the portion immediatelyadjoining the part I Figure 1 is the longitudinal section through 55 theportion immediately adjoining the portion l and showing the lowerterminal portion of the pump.

Figure 2 is a sectional view taken on the line 22 of Figure 1.

Figure 3 is a sectional view taken on the line 33 of Figure 1 Referringto the drawings wherein like numerals or reference indicatecorresponding parts throughout the several views, the numeral Iindicates the lower end portion of the well tubing 0 to which is joined,in the manner hereinafter described, the pump jacket 2.

At the lower end of the jacket 2, there is secured by means of thejacket collar 3, the standing valve barrel or seat i into the upper endof which fits the reduced lower end portion 5 of a standing valve whichis indicated as a whole by the numeral 6 This valve 6 has secured to thetop of the ball gauge, the upwardly extending pin l which is disposed onthe longitudinal center of the jacket 2 and which has a head 8.

At the upper end of the jacket 2 is a coupling 9 which has the centralinterior flange ii] and with the upper part of which is threadably con-25 ected the collar I I in which is located a sealing unit, hereinaftermore fully described. The upper end of this collar II is connected withthe lower end of the well tubing I by means of the coupling I2. Thecollar I2 also has an interior flange I3 which is similar to the flangeId of the coupling 9 and against which the lower end of the tubingabuts.

The collar I I has fitted therein the lining sleeve I4 and secured inthis lining sleeve is a selling head unit which is indicated as awhole-by the numeral 95. This unit 55 comprises a tubular center portionI6 which is exteriorly threaded at its lower end and has the lateralhead flange H at its upper end, which flange is designed to be 40located within the central part of the coupling i2.

Surroundingthe tubular portion I6 of the sealing head unit are sealingrings indicated generally by the numeral I8, which engage the interiorof the sleeve I4 to close the same. These sealing rings are secured inplace by the locking collar I9 which threads on the lower end of thebody It, and there is also threaded onto the lower end of this body thecoupling 20 which secures thereto the upper end of. a fixed barrel 2|which is held stationary in the jacket.

Slidable over the stationary barrel 2| is the barrel 22, the innersurface of which is lined by the sleeve sections 23. The upper end ofthe barrel 22 is closed by the nut 24 and this also secures the sleeves23 in place. The lower one of the sleeves 23 rests upon the upper end ofan intermediate barrel 25 which is thickened at its upper end, asillustrated in Figure 1 at 26, and has the reduced upper end portionwhich positions in the barrel 2? and provides the flange against whichthe lower liner sleeve 23 engages.

The lower end of the intermediate barrel 25 is threadably connected withthe short tubular body 21 which will be referred to as an adapter. Thisadapter has a central post 28 extending from its upper end and theportion by which this post is connected with the adapter proper isprovided with apertures 29 by means of which fluid can pass from beneaththe adapter up into the moving barrel. The upper end of the post 28 ofthe adapter is drilled and tapped to receive the threaded lower end ofthe sucker rod 29' which passes upwardly through the barrel and thestationary plunger to the top of the well.

The adapter 2? secures to the lower end of the barrel the shell ornipple 38 to the lower end of which is threadably secured the ball valveunit 3|. This unit has coupled therewith below the valve the body 32,which forms a part of a unit which is commercially available and isknown as the Reed standing valve puller. This member cooperates with thepin and head 7-8 of the standing valve, which is also a part of the unitreferred to, so that the valve may be lifted from position and drawn outof the well with the pumping apparatus, when desired. Aside from thepart which the standing valve plays in the combination, this structureand the pulling means therefor forms no part of the present invention.

In setting the pumping apparatus in the pumping jacket, the apparatus islowered through the tubing into the'jacket on the lower end of thesucker rod 29 and the sealing head unit I is forced into the sleeve ofthe collar I I by means of the sealing head seater 32. This is in theform of a collar which surrounds and is secured to the sucker rod abovethe unit l5 and when the coupling 20 of the unit starts into the liningsleeve It, the rod 29 with the traveling barrel and nipple is dropped sothat this collar will exert a force upon the unit and drive the sameinto the receiving sleeve. It will be apparent from a consideration ofthe drawings that, after the head unit has been forced into place in themanner described, upon reciprocation of the sucker rod, the travelingbarrel will, upon its down stroke, displace the fluid which will bestanding in the lower part of the casing 2, forcing the same up past thevalve unit 31 into the traveling barrel, and a continuous repetition ofthis operation will effect the forcing of the fluid up through thetraveling barrel and through the overlying pipe casing I to the surface.Any sand or grit which may have worked its way up around the outside ofthe stationary barrel 2| will be wiped off by the collar 24 as it movesupwardly on the barrel and by this means, the life of the pump will beconsiderably greater than other types of pumps as the sand and grit willbe prevented from get- 5 ting in between the contacting surfaces of themoving parts.

It will also be readily apparent that the pump may be readily removedfrom the well and another new pump of the same design inserted or the 10same pump may be repaired and then re-inserted or replaced and run tothe bottom of the tubing in the same well.

I claim:-

1. In a pump structure, a casing having an inlet valve at its lower end,a unit forming a part of said casing at a substantial distance above thelower end of the latter and comprising a collar and a pair of couplingsand a lining sleeve within the collar and secured between the couplings,a portion of the upper end of the lining sleeve being unengaged by theadjacent coupling to form a shoulder, a centrally apertured sealing unitcomprising a tube having a lateral collar at its upper end and a seriesof washers surrounding the tube, said sealing unit being disposed in thelining sleeve and said collar resting upon said shoulder, a fixed barrelsecured at one end to the lower end of said sealing unit and dependingtherefrom in the casing, a sliding barrel snugly receiving said fixedbarrel, a sucker rod extending downwardly through the sealing unit andthrough the fixed barrel and secured at its lower end to the slidingbarrel, and a valve in the lower end of the sliding barrel.

2. A pump structure, comprising a casing having an inlet valve at itslower end, a fixed barrel disposed in the casing and secured at itsupper end to the casing, a sucker rod extending downwardly through thefixed barrel, an intermediate a barrel surrounding the lower end of thesucker rod and having the latter coupled therewith, said intermediatebarrel being interiorly thickened at its upper end and having the upperterminal portion exteriorly reduced in diameter and exteriorly threaded,a sliding barrel having said fixed barrel extending thereinto andthreadably attached at its lower end to the reduced portion of theintermediate barrel, the said reduced portion of the intermediate barrelforming a shoulder within the lower end of the sliding barrel, a liningsleeve within the sliding barrel resting upon said shoulder, a nutsecured to the upper end of the sliding barrel and having a portionextending thereinto and engaging and maintaining the liner in position,and a valve coupled with the intermediate barrel and controlling theflow of fluid thereto.

DOUGLAS G. GALL.

